These young trees must ______.
| A．look after well | B．be look after well |
| C．be looked well | D．be looked after well |
Many Chinese students found______ difficult to learn English grammar.
| A．that | B．it | C．this | D．one |
---Where are you going, Jack?
--- My hair is too long. I’ll have it _______.
| A．cut | B．cuts | C．cutting | D．to cut |
---Who is the tallest boy?
---It ______ be John.. John is of medium height.
| A．must | B．needn’t | C．might | D．can’t |
---Is your father a teacher?
---Well, he ______. But now he works in a bank.
| A．were | B．used to | C．used to be | D．is |