— ________ do you usually go fishing, John?
— About once a week.
A.How B.How often C.How soon D.How long
Of the three maths problems, I have just solved ________ difficult one.
A.the more B.the most C.a most D.more
A large number of ________ will be on sale on the Internet as promised.
A.news B.progress C.tickets D.physics
This course is too easy for her son. She is planning to change to ________ one.
A.another B.other C.the other D.others
Their flowers seem dying while ________ look very lively.
A.we B.our C.ourselves D.ours
Children sometimes are better than adults ________ creative thinking.
A.for B.in C.on D.at
