—Charlie has been nowhere for three days. What has happened to him?—Didn’t you know he had gone to Hong Kong?
Although new problems ______ during the last experiment, they didn’t give up.
Some people always take seriously the ______ of the complete globe end in the near future.
— Did you visit the museum today? — No. We ______ it, but we spent too much time shopping.
I am going to do ______ I can ______ him a good impression.
Some of the doctors are paid almost ______ as the nurses.