—How do you find that Beatles’CD?
—Wonderful. It’s well worth ______.
| A．to listen to | B．listening to | C．to be listened to | D．being listened to |
When the boss came in, these workers pretended to________ carefully.
| A．working | B．be working |
| C．work | D．have been working |
People often have this belief ___development is bad for the environment, but this does not have to be true.
A which B whose C that D when
The children were ______ for the accident. After all they were so young.
| A．not to blame | B．to not blame |
| C．not blamed | D．to not be blamed |
—Mary, let’s go to the bookshop this weekend. Will you be ______?
—Sorry, but I’m going to visit my uncle in the countryside.
| A．vacant | B．suitable | C．convenient | D．available |
—Oh, dear! I forgot the air tickets.
—You ______ something.
| A．have left | B．are always leaving | C．are leaving | D．always left |