You should take off your shoes before you ＿＿＿ the new flat.
| A．leave | B．find | C．choose | D．enter |
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 |