Tom watches TV four five a week..
The plane was late, _________ we has to wait for half an hour.
Tony never spends money on traveling____ he likes staying at home.
________ is not an easy thing for everyone to master a foreign language.A. That B. This C. It
The problem must be __________ discovered next time.A. farther B.far C.further
The doctor was busy _________ on the woman at that time.A. operating B. operated C. to operate