问题

Our teacher is always busy preparing lessons until 11 o’clock at night, _____we students have gone to sleep.

A:that time
B:by which time
C:by that time
D:which time

正确答案是：

同类题型

A foreign English teacher will teach us English next term.— Wow! _______! We can practice our oral English better.

Thank you so much! How can I repay you for your kindness— _____ . It was nothing.

________________一It’s seven thirty .

Let’s go to the train station by bus.—We______take a bus. It is quite near from here.

I must apologise ________ you so late.