This soup was so hot that the children couldn't eat it

-->This soup

Susan said that she__ go because she__ an appointment in some minutes.

A. should- will have C. must-has B. needs to- would have D. had to-had

Smartphones and tablets___ in classrooms.

A. not must be used B, must be used not C. must not be used D. must be not used

This new laptop costs__my old one.

A. twice as many asB. twice as much C. as much twice as D. as many as twice