With so much water being used in the bathroom,it is no _____ that more environmentally friendly technologies have come out to make better use of water resources.
| A．surprise | B．need | C．question | D．doubt |
--Who has opened the door? ---I think it __ be Lin Tao. He’s always the first to get here.
| A．is able to | B．can't | C．must | D．mustn’t |
The boy is good ___ learning English and he does well ___ it.
| A．at, at | B．at, in | C．in ;at | D．in; in |
it's cold here. You’d better __ your clothes.
A. not put on B. take off C to put on D. not take off
What you said just now sounded ___ a good idea.
| A．to | B．for | C．like | D．with |
---How long will Tom stay here? ---____.
| A．One and a half year | B．A year and a half | C．One and a half year | D．both A and B |