He arrived here at noon, in the day, and he went out and came back in the day.
Leaders of many countries have been trying to _____ what it is that makes China develop so fast.
The computer system _____ suddenly while he was searching for information on the Internet.
—You’re always working. _____, let’s go shopping. —All you ever want to do is going shopping.
—I’ve studied growing plants as one of my interests. Could I make some suggestions? —___________.
His illness _____ his absence.