[ Grammar for TOEFL ]
Individual differences in brain-wave activity may shed light on why some people are more prone to emotional stress disorders _____
A. that others are
B. and others are
C. others are
D. than are others

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Vocabulary and Grammar › ViewGrandma ___ her photos in a big metal box.
A. keeps
B. happens
C. becomes
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The patient ___ a history of hypertension.
A. Has
B. Have
C. Had
D. Is
The great national parks (holds, hold) about 200 grizzlies, with possibly 30 of them being breeding females.
A. Holds
B. Hold
Grammar › View
Choon Eng did not do his revision _________ he failed the test.
A. so
B. if
C. but
D. because
