【題目】________online courses can produce good results remains to be seen．

A. That B. Whether

C. Who D. Where

【答案】B

【解析】根據(jù)從句網(wǎng)上課程是否能取得好效果（“whether online courses can produce good results”）是主句這件事拭目以待（“…remains to be seen”）的主語，該句主語從句。根據(jù)從句的從屬連詞具有是否的含義，該題選whether。

句意：網(wǎng)上課程是否能取得好效果仍然拭目以待。

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