Câu hỏi: Some of the grain .................... to be contaminated.

A. appear

B. appears

Câu 1: The ................ of dark red spots is one of the first signs of the disease.

A. appearance

B. appearing

C. appear 

Câu 2: ................. a lot in the mountains.

A. Snows it

B. Is snowing

C. It snows

D. Snowing is

Câu 3: A high percentage of the people ............ voting for the new school.

A. was

B. were

Câu 4: Not only the students but also theirinstructor ............. been called

A. have

B. has

Câu 5: Carlos is the only one of thosestudents who       ............. lived up to thepotential described in the yearbook.

A. has

B. have

Câu 6: A large number of voters still ............... along straight-party lines.

A. votes

B. vote