1 . 单项填空
1. －What's wrong with Jack? He is absent today.
－Oh, he is in the hospital. He _________ (ride) really fast when unexpectedly a car appeared and he had no time to avoid it.
2. You will never gain success _________ you are fully devoted to your work.
3. In English class, our teacher often creates an environment _________ we are given the opportunity to solve problems ourselves.
4. If Julia had practised hard enough last night, she _________ (be) more confident on the stage now.
5. They have leading experts in this field, and that's _________ they've made important progress.
6. Stand over there, _________ you'll be able to see the oil painting better.
7. － Is the project difficult for the students?
－ No. Most of the relevant information _________ (provide) for them.
8. As is often the case, he tends to forget all about eating and sleeping, especially when deeply _________ (absorb) in work.
9. Jane is in a hurry because the train to the airport leaves _________ half an hour.
10. The airport _________ (complete) next year will help promote tourism in this area.

2 .        on one foot with your eyes close and you will soon lose your balance.

A．Standing	B．Stood
C．To stand	D．Stand

3 . In any unsafe situation, simply ________ the button and a highly-trained agent will get you the help you need.

A．press	B．to press
C．pressing	D．pressed

4 . 【2018·海淀二模】I need help now! I have to fix a leaking pipe in my bathroom but I’m not sure ______to begin.

A．what	B．which
C．where	D．when

5 . _____ to manage time wisely, and you can make the most out of each day.

A．Learning	B．To learn
C．Learned	D．Learn

6 . _____ the plant once a week if you are to get fruit in the autumn.

A．Watered

B．Watering

C．To water

D．Water

7 . —I am learning the piano. How can I learn it well?
—________ the traditional first before trying the modern.

A．Master

B．Mastering

C．Mastered

D．To master

8 . Before getting off the train, ______ sure you have all your belongings with you.

A．making	B．to make
C．made	D．make

9 . _______ your work on time, otherwise you will be in trouble.

A．To finish	B．Finishing
C．Finish	D．Finished

10 . __ carefully if any change occurs when doing experiments in the lab.

A．Observe	B．To observe
C．Observed	D．Observing