I _______less than a pound a week when I first started work .
| A．used to earn | B．was used to earn | C．used to earning | D．was used to earning |
-What did you do yesterday afternoon?
-I went to the bookstore，___ some books and visited my uncle.
| A．to buy | B．bought | C．Buy | D．buying |
The stone on the river bank rolled under her feet; she was _____into the river，and she called out for help.
| A．being jumped | B．jumped | C．pulled | D．being pulled |
-Everyone says you are a good student. You are never late for school，are you?
-_______.
| A．No，sometimes | B．Yes，sometimes | C．Yes，I did | D．No，I do |
_____ all the inventions have in common is ______ they have succeeded.
| A．What; what | B．That; what | C．What; that | D．That; that |
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
| A．that | B．as | C．so that | D．which |