The opportunities for people to meet outside （）a lot the weather.

单项选择题You are allowed to carry-on item and one personal item on most flights, and they are both subject to size restriction.A.航空公司规定旅客一律禁止随身携带液态物品，行李超重另行收费。B.多数航班规定只能随身携带个人物品一件，超过部分要另行收费。C.大多数航班 允许随身携带一件行李和一件个人物品，大小不受限制。D.大多数航班允许携带一件手提行李和一件个人物品，尺寸都有限制。

单项选择题We are well provided _____________ food and clothingA.withB.forC.onD.at

单项选择题The bright plumage of many male birds has （） to attract females.

A.evolved
B.grown
C.developed
D.advanced

单项选择题Scientists （）the animals’ environment in order to study them.

A.duplicate
B.imitate
C.remake
D.reproduce

单项选择题Fifteen is a little young to（）a serious long－distance relationship.

A.talk down to
B.be pressed into
C.be convinced of
D.be involved in