—What shall we do this Saturday?
— it rains, we’ll have a picnic in Century Park.
A. If B. Unless C. Because D. When
It's a pity that I didn't think of ringing you .
A. earlier B. earliest C. early D. the earliest
To remember things accurately, we don't allow other thoughts our mind.
A. enter B.to enter C. entering D. entered
If you travel around the world, you will be surprised at ________.
A. how different the foreign customs are
B. how the foreign customs are different
C. how different are the foreign customs
D. how are the foreign customs different
-__________ has Line 22 (From Jinshanwei Station to Shanghai South Railway Station) been open to traffic?
A. How far B. How soon
C. How long D. How much
I ________this book for about a month, so I have to return it as soon as possible.
A. have borrowed B. have kept
C. have bought D. have posted
