So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard

The camera in your hand is nice, is it ______—Yes, but I’ll give it to my friend Lily as ______ birthday present.

I expected him to be nervous before his speech, but he was as cool as a cucumber. —He _______ it carefully.

Has Mr Lee arrived?-No.But it’s already 9 o’clock.He should________at any time.[ ]

Many a woman______ important positions in society, which________impossible in the past．