—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.A. go on B. to go on C. to go in
–I’m new here. I’m afraid of losing my way. --You can buy a . It’s helpful. A. newspaper B. map C. camera
The boy is _________ young to know ________.
---- What’s wrong with him? ---- He doesn’t feel very well. The doctor _______ just now.
When you are planting trees, the trees ________ straight in the hole.
I was about to park my car when a policeman stopped me. He pointed to a sign “________”.