If what you are teaching doesn’t _____ to your students, your students will gradually lose interest in it.
| A．attract | B．inspire | C．appeal | D．interest |
90 % of the debts _______ so far.
| A．is paid back | B．have been paid off | C．has been paid off | D．are paid off |
________cash crops will be produced next year is not yet decided.
| A．It | B．What . | C．That | D．Which |
He is ______ to come back tonight. Then we’ll have a small party.
| A．most like | B．most likely | C．mostly like | D．very much like |
As we all know, Jack is experienced _____ the problem of this kind.
| A．to work out | B．at working | C．at working out | D．for working out |
I could have helped him out, to tell the truth, I _____ too busy.
| A．am | B．was | C．have been | D．had been |