I would appreciate _______ you could give me some advice on TOFEL test.
Don't put your bicycle______ the window. The glass can be easily broken.
They met for the first time, but they talked happily as if they______ good friends for a long time.
People planted trees on the waste hills_________ water and soil loss.
Judging from his accent, he_______ be from Australia.
-Can we sit at the table by the window? -I'm sorry, but it_______ already