As ________ rule, parttime workers such as babysitters or English tutors are paid by ________ hour.
| A．the; an | B．a; an |
| C．a; the | D．the; / |
The children ____ very quiet；I wonder what they ____ up to.
| A．were； are being | B．are being；are | C．are；do | D．are being；do |
Jim talked for about half an hour yesterday. Never ____ him talk so much.
| A．I heard | B．did I hear | C．I had heard | D．had I heard |
—____ Betty this morning?
— Not yet, but she is sure to be here before noon.
| A．Have you seen | B．Will you see | C．Do you see | D．Did you see |
— Are you a visitor here?
— That’s right. I ____ round the world and now my dream of coming to China ____ true.
| A．have traveled；has come | B．was traveling had been come |
| C．am traveling；has come | D．have traveled；has been come |
All but one _____ take part in the conference ＿＿ tomorrow.
| A．is going to that is to take place | B．are going to that is about to take place |
| C．are going to that is to be taken place | D．are going to； which is to be held |