--- I usually go there by train.
--- Why not _______ by boat for a change?
| A．to try going | B．trying to go | C．to try and go | D．try going |
Nowadays people take___ exercise a day as they did in the past because of widely used automobiles.
| A．less than half | B．less than as half as |
| C．less than half as much | D．half less than |
They were standing so far away that I couldn’t_____ their faces clearly.
| A．make out | B．make for | C．make off | D．make up |
The dining room is clean and tidy, with a table already ______for a big meal．
| A．being laid | B．laying | C．to lay | D．laid |
____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
| A．What；how | B．What；what | C．That；how | D．That；what |
Among Asimov's most famous works of science fiction, one _____he won an award, was the Foundation Trilogy.
| A．of whom | B．of which | C．for whom | D．for which |