Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​I .......... lunch in the cafeteria every day.
A.has
B.am having
C.have
D.have had

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​My brothers .......... letters every week.
A.writes
B.are writing
C.write
D.is writing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​We .......... our friends very often.
A.see
B.sees
C.are seeing
D.seeing

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Her older brother _____ Texas State University now.
A.attended
B.was attending
C.is attending
D.will attend

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​My parents ………. TV now.
A.watching
B.are watching
C.watches
D.watch

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​We never ………. TV in the morning.
A.are watching
B.watch
C.have watched
D.watches

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​Our teacher always ………. us lots of homework.
A.give
B.are giving
C.gives
D.is giving

Sau khi trải qua quá trình tiêu hoá ở ruột non, prôtêin sẽ được biến đổi thành dạng cấu trúc nào?
A.Chuỗi peptit ngắn.
B.Glixêrol.
C.Axit amin.
D.Axit béo.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
​​​​​​​They often ………. the bathroom at the weekend.
A.are cleaning
B.cleans
C.clean
D.have cleaned

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Her job is to detect and analyze any _________ to public safety such as floods, earthquakes and even pollution.
A.impacts
B.threats
C.influences
D.effects