—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading. —Don’t worry. You know, sometimes the Internet ________ be very slow.

One of our rules is that every student         wear the school uniform while at school.

---May we leave the classroom now?---No, you      . You       to leave until the bell rings.

It _____ last night., because the ground is all wet 

—Could you please come to the museum with me this afternoon?—Sorry，I ________．I have to take a piano lesson at 2 pm．