The flu is believed _____ by viruses that like to reproduce in the cells inside

题型：同步题难度：来源：

The flu is believed _____ by viruses that like to reproduce in the cells inside the human nose and throat.     [     ]
A. causing
B. being caused
C. to be caused
D. to have caused

答案

举一反三

The project________by the end of 2011 will expand the city"s cable TV network to cover more users. [     ]
A. being accomplished
B. accomplished
C. to be accomplished
D. having been accomplished

题型：陕西省同步题难度：| 查看答案

As the night is falling, a long queue stood at the bus stop, nervously expecting _______.    A. to pick up
B. picking up
C. to be picked up
D. being picked up

题型：山东省模拟题难度：| 查看答案

It is important for the websites _______ regularly.[     ]
A. to be updated
B. to have been updated
C. to update
D. to have updated

题型：广东省期中题难度：| 查看答案

Oil prices are ___________ to increase by less than 20% this year. [ ]
A.forecasting
B.forecast
C.to be forecasted
D.to be forecasting

题型：同步题难度：| 查看答案

Mr Smith, ________with a new mayor, is giving his farewell speech at the meeting. [     ]
A. replaced
B. to be replaced
C. to replace
D. being replaced

题型：同步题难度：| 查看答案