A.why at that point
B.at that time
C.by this time
D.at which point

A.building a pool
B.would build a pool
C.a pool be built
D.they would build a pool

A.having informed
B.informing
C.that I informed
D.having been informed

A.congestion
B.brand
C.flavor
D.blend

A.over
B.above
C.on
D.in

A.DNA studies offer one of the best ways in future to provide clear evidence.
B.three methods of gathering evidence are mentioned in the passage.
C.the multi-regional model goes back further in history.
D.the Out of Africa model has had more support from scholars.

A.\(M\left( {\dfrac{1}{2}; - \dfrac{3}{2};0} \right)\)
B.\(M\left( {3; - 4;0} \right)\)
C.\(M\left( {0;0;5} \right)\)
D.\(M\left( {\dfrac{3}{2};\dfrac{1}{2};0} \right)\)

A.hạn hán kéo dài.
B.rét đậm, rét hại.
C.ngập lụt trên diện rộng.
D.thường xuyên xảy ra bão.

A.
B.
C.
D.

A.
B.
C.
D.