He has a toothache that's ...... he can't eat sweets.
A)when B)why C)who
The ..... is missing.
A)box's top B)box top's C)top of the box
Our parents love ..... very much.
A)we B)ours C)us
There are fifteen ....... in the classroom.
A)child B)childrens C)children
You mustn't ....... late for school again.
A)being B)to be C)be
This book is not ...... . It's Sue's.
A)mine B)me C)her
Do you know how ....... this laptop?
A)used to B)to use C) to used
You ...... call him now. You can do it later.
A)not have to B)haven't to C)don't have to