[ 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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Grammar › ViewShe spent hours __________ herself in her studies.
A. immersing
B. submerging
C. drowning
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Before I sent the email, I _______.
A. checked all the attachments
B. was checking all the attachments
C. have checked all the attachments
D. had checked all the attachments
Subject-Verb Agreement › ViewThe great national parks (holds, hold) about 200 grizzlies, with possibly 30 of them being breeding females.
A. Holds
B. Hold
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Choon Eng did not do his revision _________ he failed the test.
A. so
B. if
C. but
D. because
