The teacher told us the earth________around the sun.
| A．going | B．went | C．was going | D．goes |
Mary _____ by the lake when a black cat ran past her.
| A．sat | B．has sat | C．was sitting | D．sits |
---Where is our English teacher? ---She_____ London.
| A．went to | B．has went to | C．has gone to | D．has been to |
---_____ have you studied English? --- Since I was six.
| A．How often | B．When | C．How long | D．What time |
— Kate! Let’s go to work right now. We’ll be late.
— _____. We still have 20 minutes left.
| A．Take it easy | B．Not at all | C．That’ s all right | D．You’re welcome |
She is often seen ______ the old woman.
| A．help | B．helping | C．to help | D．help to |