She _____ the book sometime in the past as there is no way she could have answered the questions so accurately.
| A．ought to read | B．must have read |
| C．must read | D．should have read |
Doctor Brown says that _______ what forceful arguments against cigarette harm there are, many people insist on smoking.
| A．though | B．however | C．no matter | D．even if |
The government has taken some measures to solve the shortage of electricity, but it may be some time _______ the situation improves.
| A．since | B．when | C．unless | D．before |
They are always ready to give the vacant seats to _______ comes first.
| A．who | B．whom | C．whoever | D．whomever |
His joke went too far. It was more than I could_________ .
| A．get rid of | B．put up with | C．keep up with | D．do away with |
He never thought the committee would _____ his proposal.
| A．put forward | B．object to | C．stand for | D．pass on |