—Jim, do you know the reason _____ Bob kept silent during the discussion?
—I guess he was thinking about his sick dog. It might be dying.
A. why B. what C. where D. which
We’ll leave for senior high schools soon. It’s really difficult _______ goodbye to our teachers and friends.
A. to say B. to speak
C. saying D. speaking
—Let’s climb the mountain.
—I don’t agree. _______ the mountain will make us exhausted.
A. Climb B. Climbing
C. Climbed D. Climbs
—What ______ in your school in the past few years?
—A new library and a playground were built last year.
A. happens B. happened
C. has happened D. had happened
So much homework and so many after-school activities really make the students feel _______. That’s why we should lighten the burden(减负) on students.
A. pleasant B. excited
C. embarrassed D. tired
It was amazing. Let’s find out what was the _______ of the accident.
A. because B. excuse
C. cause D. reason
