A.be late for work three times
B.late for work three times
C.had been late for work three times
D.that he had been late for work three times

A.what you have done
B.that you have done
C.what have you done
D.whether have you done

A.the fact that the president was in poor health
B.why the president was in poor health
C.that the president was in poor health
D.that was the president in poor health

A.to take which English course
B.which English course you should take
C.that which English course to take
D.which English course should you take

A.which was her son kidnapped
B.which her son was kidnapped
C.that her son was kidnapped
D.that was her son kidnapped

A.to live
B.where you live
C.how you to live
D.where do you live

A.when will the concert begin
B.when the concert will begin
C.when would the concert begin
D.when the concert would begin

A.when is our team going to lose
B.as that our team is going to lose
C.what our team is going to lose
D.that our team is going to lose

A.Đốt dây sắt trong bình đựng đầy khí O2.
B.Nhúng thanh gang (hợp kim sắt và cacbon) vào dung dịch HCl.
C.Nhúng thanh sắt nguyên chất vào dung dịch FeCl3.
D.Nhúng thanh sắt nguyên chất vào dung dịch HNO3 loãng.

A.hình dáng lãnh thổ và sự phân bố địa hình.
B.đặc điểm khí hậu và sự phân bố địa hình.
C.hình dáng lãnh thổ và sự phân mùa khí hậu.
D.đặc điểm địa hình, sinh vật và thổ nhưỡng.