Question

Taking a trip abroad is certainly good for old couples, but it remains ____ whether they will enjoy it.

A．to see

B．to be seeing

C．to have seen

D．to be seen

Answer 1

D

試題分析：句意：去國(guó)外旅行對(duì)這對(duì)老夫妻是好的，但是否他們喜歡還有待以后再看。這里it是形式主語(yǔ)，whether they will enjoy it是真正的主語(yǔ)從句，這里it與see之間是被動(dòng)關(guān)系，故選D。
點(diǎn)評(píng)：本題難度適中。做這題需要解析句子結(jié)構(gòu)，確定設(shè)空在句子中充當(dāng)?shù)墓δ埽ㄈ鐮钫Z(yǔ)、定語(yǔ)或賓補(bǔ)）；找準(zhǔn)相關(guān)動(dòng)詞的邏輯主語(yǔ)，確定該動(dòng)詞與邏輯主語(yǔ)是什么關(guān)系（主動(dòng)還是被動(dòng)）。
即學(xué)即練：Dinosaurs have completely died out on the earth，never _________ again.
A. to be seen             B. being seen
C. seen                   D. having been seen
解析：A。句意：結(jié)果再也沒(méi)有人見(jiàn)過(guò)。