27．At last, the boys found themselves in a pleasant park with trees providing shade and____down to eat their picnic lunch.
| A．to sit | B．sat | C．sitting | D．having sat |
There ___ two football matches on TV tonight.
| A．are going to have | B．are going to be | C．is going to be | D．are going to has |
---Beautiful day ,___? –Yes, ____?
| A．is it, isn’t it | B．isn't it, it is | C．is itl is it | D．isn't it; isn't it |
--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