The number of red-crowned cranes is getting ___________.
| A．small and small | B．little and little |
| C．smaller and smaller | D．less and less |
Tom ______ be in his office so late that night. I saw him with his friends in the restaurant .
| A．can’t | B．may not | C．mustn’t | D．shouldn’t |
---How many children have you got ?
---Two , _______ of them are studying in the university.
| A．both | B．all | C．any | D．none |
We must pay attention to _______ the teacher carefully in class.
| A．listen | B．listening to | C．hear | D．hearing |
We __________for a picnic if it ___________this Sunday.
| A．won’t go , will rain | B．won’t go , rains |
| C．didn’t go , is raining | D．don’t go , don’t rain |
The house ________ in1950.
| A．build | B．building | C．built | D．was built |