Mathematics _____ the language of science. [ ]a. is b. has been c. are d. ha
题型：专项题难度：来源：
| Mathematics _____ the language of science. |
| [ ] |
a. is
b. has been
c. are
d. have been |
答案
| a |
举一反三
| Every man, woman and child _____ some history, enough at least, to survive in the world. |
| [ ] |
a. knows
b. know
c. is known
d. are known |
| None of them _____ my friends. |
| [ ] |
a. is
b. are
c. was
d. has been |
Not only the whole nation, but the whole Europe, indeed the whole human society _____ to alter its attitude
to racial problems. |
| [ ] |
a. need
b. needs
c. has a need
d. have a need |
| Getting to other planets or to the moon _____ many problems. |
| [ ] |
a. involve
b. involves
c. involving
d. to involve |
| In that country, the rich _____ richer, the poor, poorer. |
| [ ] |
a. become
b. has become
c. becomes
d. is becoming |
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