8The doctor insisted she____in bedBut her smiling face suggested there____nothing serious

My mother often tells me _________ too fast because there are too many cars in the street.

The computer system____suddently while he was searching for information on the Internet.

_____ to make a speech, he said he would be glad to.

usually cool in April in Chongqing,but it sometimes ______ be rather hot for a few days.