1 . —It has been much easier for me to go to work          shared bikes appeared.
— But they also caused plenty of problems.

A．since

B．before

C．unless

D．though

2 . Zhong Wei told his friends _________ to be back to his hometown.

A．how happy he is	B．how happy he was
C．he is how happy	D．he was how happy

3 . —Do you like the weekly program Readers on CCTV?
— Sure. It’s a great TV program _________ can develop the habit of reading.

A．who

B．that

C．what

D．whose

4 . —What do you think of your junior high school life?
—I think it is enjoyable,   _________ I sometimes have some trouble in study.

A．if

B．though

C．while

D．until

5 . Just as the poor passengers on the real Titanic saw the tip of the iceberg, ________ we see on the cinema screen is just the tip of the huge iceberg of film-making.(用适当的词填空)

6 . When we work, we must practice our skills constantly and continuously ________ we excel in what we do. （用适当的词填空）

7 . In the summer of 1405, Zheng He, one of China’s greatest explorers, set sail from Taicang on his first voyage. A fleet of over 200 ships navigated the blue seas. It would take 500 years _____________ a larger fleet sailed the seas. (用适当的词填空)

8 . The hospital________I visited for advice on sleep problems is near my home.

A．where

B．which

C．how

D．why

9 . At the same time, Miss Brown quickly opened the classroom door,____________________ it became damaged during the shaking and could not open. (根据句意填空)

10 . 约翰，坐在我能看见你的地方。
John, sit ________________. (where引导的地点状语从句)