29.He was delighted at______.（  ）

A.how the airline had been efficient

B.how efficient the airline had been

C.how efficient had been the airline

D.how had the airline been efficient

29.B【解析】句意：他對(duì)飛機(jī)航線的高效率感到很高興。delighted at 后面接賓語(yǔ)從句，用陳述語(yǔ)序。故選B。

30.A university is an educated institution which awards degrees and ______ research.（  ）

A.carries forward

B.carries through

C.carries off

D.carries out

30.D【解析】句意：大學(xué)是一個(gè)授予學(xué)位和開展科學(xué)研究的教育機(jī)構(gòu)。carry forward“發(fā)揚(yáng)，推進(jìn)”；carry through“貫徹，完成”；carry off“獲得，奪去”；carry out“執(zhí)行，貫徹，開展”。需注意carry through常用作carry sb.through sth.或carry sth.through。故carry out在本題更為合適。因此選D。

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