.Xiao Li is said _________ abroad, but I don’t know what country he studied in.
| A．to study | B．to be studying | C．to be studied | D．to have studied |
After ten hours’ drive, we came to ______ is called a green house, through the glass wall of _____, we saw lots of green plants.
| A．where, which | B．that, that | C．what, which | D．where, that |
—Mother, I climbed up to that tall tree and picked this big apple.
—Jesus! You______ down and hurt yourself.
| A．might have fallen | B．might fall | C．must have fallen | D．must fall |
—Do you remember when I first met you?
—Of course. I __________ in a small food factory.
| A．worked | B．was working | C．had been working | D．work |
—I didn’t expect that John would be absent from my last Sunday’s birthday party.
—As far as I know, he ______ to see his parents in the countryside on Sundays.
| A．goes | B．went | C．has gone | D．had gone |
_____ to improving services, we will provide customers with all the information they need.
| A．Being committed | B．Having committed |
| C．Committed | D．Committing |