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We don’t doubt     he will succeed in the work.

A.that        B.whether        C.how        D.what

We are　　  all the other teams at present.

A.very ahead of　　　　　　　　　　B.well ahead of

C.very head for　　　　　　　　　　D.well ahead for

Scientists think they have _____ in their attempt to find the causes of some major dieases.

   A. broken through    B. worked out

   C. fallen out        D. got round

___ being Sunday, the library was closed.

A. That    B.It is    C.It     D.This

A lock ___ locking a door.

A. is used to   B.used to   C. is used for   D. is used into

The branches could hardly _____ the weight of the fruit.

A. retain    B. maintain   C. sustain    D. remain

It was clear that the small grocer was _____ people he owed money to.

   A. at the expense of     B. at the risk of

   C. in the way of         D. at the mercy of

Mary had taken _____ to see that her guests had everything that they could possibly want.

   A. efforts    B. pains    C. attempts    D. endeavors

The farmers were more anxious for rain than the people in the city because they had more _____.

A. at length    B. at last    C. at stake    D. at ease

Thomas Edison considered genius to be _____ one per cent inspiration and ninety-nine percent perspiration.

   A. composed of     B. constituted in

   C. consisted of    D. comprised in