9. Five coronal mass ejections have been released from the sun in a short period of time, _______ due to hit the Earth and cause geomagnetic storms.
(A) three of them
(B) three of which are
(C) three of them are
(D) three are

答案：登入後查看
統計： A(30), B(89), C(46), D(2), E(0) #3245024

詳解 (共 4 筆)

#6287658
關係代名詞:通常用 who 來代替『人...
(共 814 字，隱藏中）
前往觀看
11
0
#6424493
(A) three of them→ 缺...
(共 181 字，隱藏中）
前往觀看
10
0
#6404685
Five coronal mass ejections have been released from the sun in a short period of time, three of which are due to hit the Earth and cause geomagnetic storms.
太陽在短時間內發生了五次日冕物質拋射，其中三次將襲擊地球並引發地磁風暴。
1
0
#6464701

Full sentence:

Five coronal mass ejections have been released from the sun in a short period of time, three of which are due to hit the Earth and cause geomagnetic storms.

Explanation:

This sentence requires a relative clause to provide more information about the five coronal mass ejections. The phrase “three of which are” is the proper relative clause structure here. It refers to part of a previously mentioned group ("five coronal mass ejections") and provides extra information.

Let’s break down why the others are incorrect:

  • (A) three of them – This is a noun phrase, not a clause, so it doesn’t connect grammatically to the rest of the sentence.

  • (C) three of them are – This forms a new independent clause, making the sentence a run-on.

  • (D) three are – Similar to (C), it begins a new clause without proper punctuation or connection.

✅ Correct structure: [main clause], [relative clause beginning with 'of which']
Hence, (B) is the only grammatically correct choice. 

ㅤㅤ
ㅤㅤ
0
0