1. [单选题]"Let us go,______?" the Smith said to the officer.
A. will you
B. won't you
C. shan't we
D. don't we
2. [单选题]Jim did not do the stealing himself,______.
A. so he was not a thief in fact
B. because he was less intelligent than other
C. but he made stealing plans and gave orders
D. for he was afraid of being caught
3. [单选题]If I had known you weren’t coming. I ____ a cake.
A. would not bake B.did not bake
B. will not have baked
C. would not have baked
