—Shall we play basketball this afternoon？

—Good idea!Do you have basketball？（　　）

A．the；aB．a；aC．/； /D．/；a

Which underlined letter pronounces differently from the others？（　　）

A．dogB．polluteC．knockD．strong

Miss Li，a humorous teacher，taught maths last term.（　　）

A．usB．ourC．oursD．ourselves

Jim，you'd better not too much time on your mobile phone.（　　）

A．costB．spendC．takeD．pay

The Communist Party of China will have its 100th birthday July 1，2021.（　　）

A．inB．atC．onD．around