He is a poorly learned man, but he acts as though he _____.
There was an _________ look on his face when he knew the bad grade of his son.
The way ____ he spoke English is more like that of an American.
It wasn’t until nearly a month later ____ I received the manager’s reply.
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
The child asked his mother _______ go out to play tennis.