A.I am not sure whether Nancy was at home last night or not.
B.No one knows whether Nancy was at home last night.
C.Nancy should have been at home last night.
D.Nancy must have been at home last night.

A.I am not sure whether Nancy was at home last night or not.
B.No one knows whether Nancy was at home last night.
C.Nancy should have been at home last night.
D.Nancy must have been at home last night.

A.I have difficult in sleeping in a filthy place like this.
B.I can't possibly sleep in a filthy place like this.
C.I find it possible to have a good sleep in the quiet place.
D.I have difficulty to sleep in such a filthy place like this.

A.Dad praised me for my flying colour in the university entrance exam.
B.Dad told to me that it was wonderful that I had been accepted to university.
C.Dad encouraged me to make efforts to be accepted to university.
D.Dad congratulated me on being accepted to university.

A.
B.
C.
D.

A.
B.
C.
D.

A.\({\log _{{a^c}}}b = c{\log _a}b\)               
B.\({\log _a}b.{\log _b}c = {\log _a}c\)
C.\({\log _a}\left( {bc} \right) = {\log _a}b + {\log _a}c\)
D.\({\log _a}b = \dfrac{1}{{{{\log }_b}a}}\)

A.fully
B.very much
C.incredibly
D.enough

A.wide
B.large
C.huge
D.broad

A.Both hypotheses cite Africa as an originating location.
B.Genetic studies have supported both hypotheses.
C.One hypothesis dates the emergence of homo sapiens much earlier than the other.
D.Both hypotheses regard Neanderthals to be the predecessors of modern humans.