Lin saw __________ UFO last month. It’s strange.

A medicine may help with your illness, but it may make you , so you must be careful not to drive a car after taking such a medicine.

What are you going to do this weekend?— I’m not sure ______. Maybe I am going swimming.

How many times____Chang’e I____the moon ? —Only once.It ____there last year.

）I’ll_________ advertisements after school so that we can tell people about the park clean-up.