[ Preposition & Gerund ]
Brian really has to work _______ improving his vocabulary.
A. in
B. at
C. on
D. for

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Modals › ViewWhich sentence uses a modal verb to express a strong possibility?
A. She might be at the park.
B. She could be at the park.
C. She must be at the park.
D. She can be at the park.
Grammar › View
The email ___ (not receive) yet.
A. is not received
B. has not been received
C. was not been received
Coordinating Conjunctions › ViewHe is allergic to peanuts, _____ he loves peanut butter sandwiches.
A. yet
B. however
C. and
D. because
Vocabulary › View
Exacerbate
A. Complicate; make worse
B. Deflate; let down
C. Eat
