单项选择题
A.Because it keeps you calm. B.Because it strengthens your memory. C.Because it stimulates your nerve activity. D.Because it improves your problem solving strategies.
A.It sends out signals for help. B.It takes over the driving immediately. C.It stops the car automatically. D.It sounds an alarm to warn the driver
A.Who are going to attend the meeting. B.What’s to be discussed at the meeting. C.Where the meeting is to be held. D.When the meeting is to be held.