Tom is indeed a good child; he often helps his parents clean and ________ the bedrooms on Sundays.

Recently, we have experienced __________ problems about the school computers, such as slow speed of the Internet.

Could you tell me

’s the noise It sounds as if itcomes from upstairs –______ It must be thewindow-cleaner working , nextdoor

Who do you think will be in charge of our class during Mr. Wang’s absence—I don’t know. _________I am not particular about teachers.