Although dolphinssometimes swim singly or in pairs,they usually [congregate] in largeherds,often numbering in the hundreds.

[单选题]Young people often[congregate] in the main square in the evenings.A.congrat

[单选题]A．lthough a ship usually has repair in a shipyard, ________ is also necessaryA．the general repair on boardB．the voyage repairC．the annual repairD．the dock repair

[单选题]He likes to swim _______.A.and to play football B.and playing footballC.but

[单选题]18．1 can _________ swim _________skate． Will you teach me how to swim and skate?A． not only，but alsoB． both，andC． either，orD． neither，nor

[单选题]Some cranes are mounted in pairs on a common platform. which can be rotated through_____.A．360oB．270oC．180oD．90o

[单选题]Which of the following pairs is not a minimal pair？( )A./sip//zip/B./fi：l//

[单选题]Which of the following pairs is not a minimal pair？( )A./sip//zip/B./fi：l//

[单选题]Which of the following pairs is not a minimal pair？( )A./sip//zip/B./fi：l//

[试题]Swim Co offers training courses to athletes and has prepared the following breakeven chart:Required:(a) State the breakeven sales revenue for Swim Co and estimate, to the nearest $10,000, the company’s profit if 500 athletes attend a training course.

[主观题]以下程序段的输出结果是。 num=0 while num<=2 num = num+1 wend Print