--- What has happened to Alice ?
--- I don’t know. She her job.
| A．can have lost | B．may have lost | C．should have lost | D．need have lost |
The doctor said jokingly that his own infection of the virus _______ the discovery of a vaccine (疫苗)of the disease.
| A．stood for | B．called for | C．paid for | D．contributed to |
-- Jimmy had a lot of parties recently.
-- Yes, that might ______ why he didn’t do well on the test.
| A．sum up | B．push for | C．account for | D．compensate for |
In order to work better in the future, each of us must first of all know our ______ and weaknesses.
| A．strengths | B．benefits | C．techniques | D．values |
31. The engine of the bus was out of order and the bad weather ______ the worries of the passengers.
| A．added up | B．added to | C．resulted from | D．made of |
-- Why didn't Mike attend the evening party?
-- He is a quiet boy; He loves reading at home ______ to parties.
| A．than go | B．rather than going | C．than going | D．more than goes |