[ Grammar ]
In recent years, the government of Vietnam has invested ____ improving infrastructure and investigating the floral, faunal, geological, and geomorphological characteristics of national parks.
A. to
B. in
C. on
D. for

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Inversions and Subjunctive › ViewIt is vital ….. the patient today.
A. that visitors not disturb
B. that visitors don’t disturb
C. not to disturb
Grammar › View
In general, by the second year of production, the price of a few technologies_______ significantly.
A. will decrease
B. will have decreased
C. has decreased
D. will have been decreased
Tenses › ViewWe ……………………….. together in the restaurant.
A. have eat
B. has eaten
C. are eaten
D. have eaten
E. doesn’t eat
Tenses › View
When he came ……………………..
A. I was watching TV
B. I watched TV
C. I am watching TV
D. I have watched TV
