Teachers should be strictstudents andtheir study. [ ]
Whenever I go to Beijing, ____ is quite frequent, I will go to visit the Great Wall.
Hi, Cindy! How are you? —I’m OK.
The light in his office is still on. Do you know _______?—To prepare for the material(材料) the meeting will need tomorrow, I think.
Tom must be waiting for you now, _______?