【单选题】
Chinese economic and trade exhibitions have[填空] the exchange of the advanced techniques with foreign countries.
【单选题】
Trade with other countries [填空] important.
【单选题】
If I [填空] you, Id ask her.
【单选题】
You have[填空]progress with your English.
【单选题】
I want you[填空] this report.
【单选题】
It looks[填空] he knew a lot about it.
【单选题】
The sun [填空]from behind the clouds.
【单选题】
This path is only for [填空].
【单选题】
The[填空] for this is that this plane is also a bicycle.
【单选题】
The boat pulled [填空]alongside the ship.