Monkeys in the zoo started to show the flu _____ last Monday and altogether twenty have died up to now．
| A．symbol | B．sign | C．signal | D．symptom |
相关试题
The report indicates that the new power station produces energy as the one built earlier.
| A．twice as much | B．as twice | C．twice much as | D．twice much |
So far there is no proof people from other planets do exist.
| A．how | B．what | C．which | D．that |
_____ scores of times , but he still couldn’t understand it ．
| A．Having explained | B．Having been explained |
| C．Though it was explained | D．It was explained |
________ their son away to college, the old couple got more room in the house．
| A．As | B．For | C．Through | D．With |
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