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
Why not use stones to build our new house? A house built of stone does not catch fire as easily as ______ made of wood.
A. one B. it C. this D. that
