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When considering how to settle the problem, the most important factor-weather, our teacher had ____.

A.left out                    B. left behind                      C. left off                    D. left over

Don't ____ the others on the trail in case you get lost.

A.drop off                   B. drop out                  C. drop behind                    D. drop up

She started an engineering degree but ____ after only a year.

A.dropped off 　　　　 B. dropped out 　 C. dropped in D. dropped behind

The while blood cells protect the body ____ disease germs.

A.from attacking B. from being attacked C. from being attacked by D. attacked by

John has insured all his properties to protect them ____ losses from damage or destruction.

A.at                            B. against                    C. with                              D. on

The results of economic mismanagement were ____ by a series of natural disasters.

A.added 　　　　　　B. magnified 　　　 C. increased D. lifted

As I grew up in a small town at the foot of a mountain, the visit to the village ____ scenes of my childhood.

A.called up                  B. called for                       C. called on                 D. called in

In the dark forests ____, some large enough to hold several English towns.

A.stand many lakes 　B. lie many lakes 　 C. many lakes lie D. many lakes stand

The manager had fallen asleep where he ____, without undressing.

A.was laying                      B. was lying                       C. had laid                  D. had lied

In 1911, Madam Curie received a second Nobel Prize for her research, the first person in the world ____ two Nobel Prizes.

A. received B. receiving C. to receive D. had received