1．We have an informal (非正式的) agreement to ride to school together.
2．I'd like to take this opportunity (机会) to thank everyone for their hard work on the project.
3．The enemy forces were advancing (前进) against our defense works.
4．She is certain (确信) that the young man has gone mad.
5．He blinked, yawned (打哈欠) and looked around.
6．A large number of plants died for lack (缺少) of water.
7．His encouraging remarks inspired confidence(自信) in me.
8．We are currently focusing seriously (认真地) on this matter.
9．She greeted her neighbor with a nodding (点头)．
10．She sighed (叹气) as she lay back on the bed.
