He failed the mid-term examination and only then _______ how much time he had wasted.
| A．had he realized | B．did he realize |
| C．he had realized | D．he realized |
Time is pressing; it’s impossible for me to get there in an hour, ________ the possible delays.
| A．accounting for | B．answering for |
| C．allowing for | D．heading for |
The kitchen might have been workable had Nicola kept it tidy; ________ it was littered with pots and pans.
| A．therefore | B．anyhow | C．instead | D．though |
—Did Jack take the doctor's advice that he _____ in bed for another three days?
—If only he_____．
| A．lie; had | B．lies; does |
| C．lies; would | D．lie; did |
The proportion of elderly people increases in Britain and medical advances make it possible to keep alive patients who ________ previously.
| A．would die | B．had died |
| C．should have died | D．would have died |
The true traveler sets out to make an independent, unhurried journey to the unknown, travelling ________ few people have set foot.
| A．in which | B．what | C．when | D．where |