We _________wait until the traffic light turns green when we cross the road.
| A．must | B．can | C．need | D．may |
Fish sleep _____ their eyes ______.
| A．with;open | B．without;open | C．with;close | D．with;closed |
Are you _____ in these _____story books.
| A．interested. interesting | B．interested. interested. |
| C．interesting. interested | D．interesting. interesting |
——Who watered the flowers beside the window?
——Helen ____________.
| A．Did | B．Do | C．did | D．does |
It is _______ unusual thing for us to find ________ UFO.
| A．a; a | B．an; an | C．a; an | D．an; a |
It takes me two hoursmy homework every day.
| A．doing | B．to do | C．did | D．does |