You are eating a lot of high-fat foods. Try to________if you want to lose weight.
A.cut back
B.die off
C.drop out
D.doze off

Cho 140 ml dung dịch Ba(OH)2 1M tác dụng với dung dịch chứa m gam Al(NO3)3, sau khi phản ứng kết thúc thu được 6,24 gam kết tủa. Giá trị của m là
A.31,95.
B.25,56.
C.
D.

How long after the founding of the modern Olympics were the Winter Olympics introduced?
A.20 years
B.24 years
C.28 years
D.32 years

The average age at which people begin to need eyeglasses vary considerably.
A.average
B.at which
C.begin to need
D.vary considerably

Dung dịch nào sau đây có pH < 7?
A.HCl.
B.Ba(OH)2.
C.NaCl.
D.NaOH.

(40) ______
A.complete
B.find
C.compete
D.exist

Submit the report to the boss ________ it.
A.unless you would finish
B.provided that you would finished
C.if you have finished
D.if only you finished

We'd better speed up if we want to get there in time.
A.slow down
B.turn down
C.put down
D.lie down

While playing hide and seek, the children came across some old photos in the attic.
A.took by mistake
B.looked for a reason
C.discovered by accident
D.found on purpose

A.matter
B.back
C.bag
D.talk