—Do you know where David is? I couldn't find him anywhere.
—Well. He __________ have gone far—his coat's still here.
| A．shouldn't |
| B．mustn't |
| C．can't |
| D．wouldn't |
I really wonder ______ he has posted me many parcels _____ we worked together .
| A．how ; after | B．why ; when | C．when ; before | D．why ; since |
It is a rule in his family that ______ comes home earlier should cook the dinner for the family .
| A．anybody | B．who | C．who that | D．whoever |
The duties of a policeman are _____ than ____ .
| A．dangerouser ; a teacher | B．more dangerous ; a teacher |
| C．greater danger ; those of a teacher | D．more dangerous ; those of a teacher |
The black horse is _____ of the pair .
| A．the strongest | B．the stronger | C．the strong | D．quite strong |
Mother told Jim to watch the milk until it boiled and then _____ off the gas.
| A．turn | B．turning | C．turned | D．having turned |