18．—Jim, are you ______ this Saturday?
—Oh, sorry. I need to go to the bookshop _____ the bank on Saturday.
| A．convenient; and | B．convenient; as well as |
| C．available; as well as | D．available; with |
The parents were shocked by ________ news that their son needed ________ operation on his knee.
| A．a；/ | B．the; / | C．the; an | D．a; an |
People develop ________ preference for a particular style of learning at ________ early age and these preferences affect learning.
| A．a；an | B．a；/ | C．/；the | D．the；an |
Marco Polo is said to have sailed on ________ Pacific Ocean on his way to Java in ________ thirteenth century.
| A．the；a | B．a；/ | C．/； the | D．the；the |
It was________cold winter night and the moon was shining brightly across________night sky.
| A．/；a | B．a；the | C．the；a | D．the；/ |
Animals are obviously ________ lower form of life than ________ man.
| A．a；/ | B．the；the | C．a；the | D．/；/ |