I’m sorry I didn’t phone you, but I’ve been very busy ____ the past couple weeks.
“When my husband died five years ago,__________ was difficult to go from ‘we' to ‘me',”said Joe Kita to us.
Professor White has written some short stories, but he is________known for his plays.
—How do you think of your visit to Qingdao?—I enjoyed it. It was ________ than I expected.
—Do you think I could borrow your bike?—________.
At present ________ of the experiments ________done in labs after the new building has been finished.