—I hear Johnson ______ in the middle school.
—What? I can’t imagine him ______ as a teacher.
A.teach;to work |
B.teaches;working |
C.teaches;to work |
D.teach;working |
It is reported that in our country cities ________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
A.suffering | B.suffer | C.suffered | D.are suffering |
It's ten years since the scientist _______to discover the valuable chemical.
A.kept up | B.set out | C.took in | D.set about |
I called Bruce many times yesterday, but I couldn’t get through. His brother ____ on the phone all the time.
A.was to talk | B.was talking | C.would be talking | D.had talked |
Although Fleming discovered Penicillin, it was over a decade ______ someone else turned it into the great drug of the 20th century.
A.before | B.since | C.when | D.as |
—Look! Here is a message on my mobile phone, asking me to send money to....
—Don’t believe it! It’s a trick. More than one person _____ by such tricks so far.
A.had been cheated | B.was cheated | C.have been cheated | D.has been cheated |