– Physics _____ more difficult than Chinese, do you think so? -- Yes, I think so. A. is B. are C. has
—Sorry, I’m late. Has the meeting begun? —It doesn’t matter. The meeting _______ for several minutes.
He didn’t listen to the teacher carefully._______ , he couldn’t answer the questions.
He is such a busy man that it’s hard for him to________ enough time to meet us at the airport.
Tom’s decided to devote all he could ________ his English before going abroad.
—_________I borrow your lighter for a minute? —Sure, no problem. Actually, you _________keep it if you want to. I’ve given up smoking.