The manager came over and asked the customer how ___________.
A.did the quarrel come about | B.does the quarrel come about |
C.the quarrel has come about | D.the quarrel had come about |
It is not until recently ______ the scientists have found proof of there being water on Mars.
A.when | B.that | C.how | D.what |
______ our horizons of thinking, but it also saves us time and energy.
A.Not only does the Internet expand | B.Not only expands the Internet |
C.Not only the Internet expands | D.Not only the Internet does expand |
An excellent way to help memory is to connect information with pictures, which ______ as a memory-link method.
A.considers | B.is considering | C.is considered | D.Considered |
Air bags for cars were invented _____ lives. Without them more people would be injured in car accidents.
A.saving | B.saved | C.to save | D.to have saved |
Last year John earned _______ his brother did, who has a better position in a bigger company.
A.twice as many as | B.twice as much as |
C.twice as more as | D.twice much as |