David apologized for ________ to inform me of the change in the plan.
| A．his being not able | B．him not to be able |
| C．his not being able | D．him to be not able |
---How long _______ each other before they ________ married ?
-- -For about a year .
| A．have they known ; get | B．did they know ; were going to get |
| C．do they know ; are going to get | D．had they known ; got |
---How long _______ each other before they ________ married ?
-- -For about a year .
| A．have they known ; get | B．did they know ; were going to get |
| C．do they know ; are going to get | D．had they known ; got |
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 |