He spent at least as much time reading as you _______on line yesterday

It is said that the software on learning subjects for pupils in a very practical way

In China when caught, those corrupt(腐败的) officials are sometimes limited to __________ in acertain place, only __________ their problems within an appointed time(规定的时间).

在英语中,有____个元音字母,有____个元音音素。

I really enjoyed your talk, ________ there were some parts I didn’t understand.