22．Lawrence Craven, a doctor from the USA，is the author of several published reports, one of______ introduced the idea in 1953 ______aspirin could reduce the risk of heart attacks．
| A．them; when | B．which; that | C．what; that | D．which; when |
That was really a splendid evening．It’s y
ears ______ I enjoyed myself so much．
| A．when | B．that | C．before | D．since |
The manager had fallen asleep where he ______, without undressing．
| A．was laying | B．was lying | C．had laid | D．had lied |
Kathy______ a lot of Spanish by playing with the native boys and girls．
| A．picked up | B．took up | C．made up | D．turned up |
I really can't understand ______ her like that．
| A．you treat | B．you to treat | C．why treat | D．you treating |
Never before______ so highly successful in his attempts to forecast the weather accurately on
a small scale．
| A．man has been | B．man is |
| C．has man been | D．will be man |