Ⅰ.单句语法填空
1．The number you dialed is engaged(engage) at the moment.Try again in five minutes.
2．China is still a developing (develop) country.
3．Do you know the man standing(stand)under the big tree?
4．Listen！The song being sung (sing) is very pleasant.
5．I'd appreciate it if you could let me know in advance whether you will come or not.
6．I have the image of you as always being cheerful(cheer) and optimistic.
7．It was the drunk driver who/that was to blame for the accident.
8．The new technology，if applied(apply) to farming，will help increase the grain output.
9．By making friends with the native speakers，one can pick up a lot of their languages.
