Don’t turn off the computer before closing all programs, _________ you could have problems.
| A．or | B．and | C．but | D．so |
The tourists were struck by the beauty of _________ nature and then they stayed for _________ third day.
| A．the; the | B．/; a | C．the; / | D．/; the |
I think ___ good knowledge of English is ___ great help when you are traveling around the world.
| A．X，a | B．a，a | C．a，the | D．a，x |
I think it is _____ waste of time to play games on ____ Internet all day long.
| A．a ; a | B．the ; / | C． a ; the | D． the ; the |
—Stay a bit longer, it’s been such ________ fun having you.
—Thanks, anyway. I’ve got ________ early start tomorrow morning.
| A．/, the | B．a, an | C．/, an | D．the, an |
—Her dream is to turn _________film star, while her sister’s is to open_________film academy.
| A．a; a | B．a;/ | C．/;a | D．/;/ |