1 . 根据所给词适当形式填空

put on, due to, communicate with, be effective in, even if, help … out, in case of, have a sense of achievement, establish one’s own company, by accident

1. Mr Green is a warm-hearted man, and he is always willing to ________ others________ whenever he is needed.
2. This exercise seems simple. However, it ________ helping you break away from those bad feelings.
3. You will ________ if you can make it to the end of the long story.
4. Yesterday afternoon, when I was shopping in a supermarket, I met an old friend_________.
5. ________ the heavy fog on that day, all the flights of the airline had to be put off until the fog cleared.
6. This programme can help you recover documents ________ a power failure or system crash.
7. I knew I needed to apolpogise to Henry, ________ he also did something that hurt my feelings.
8. The new play will be ________ in some major cities next month, so we will have the chance to enjoy it.
9. My smart phone makes it possible for me to ________ others wherever I go.
10. My elder brother has been working hard in the hope of earning money to ________ one day.

2 . ________ our new product hasn’t been accepted by the public, I think its potential market is large.

A．While

B．Unless

C．Once

D．Before

3 . It can be difficult to develop a new habit ________you know the habit is positive and useful.

A．now that

B．even if

C．until

D．unless

4 . ________ I fail this time，I would try again.

A．If only

B．Even if

C．Whether

D．As if

5 . ________ they never reached their goal of spaceflight ,they led the way for other Amercian women to travel into space .

A．Unless	B．Even though
C．Now that	D．Once

6 . Please only answer one question at a time, ________ you know more, to give everyone a chance.

A．even if

B．as if

C．if only

D．if

7 . ______ great achievements the world may have in the future, the part China will play can't be left out.

A．If

B．Whatever

C．Whichever

D．However