．—You've dropped ________ “s” in the word “acros”．
—Oh, ________ letter “s” should be doubled like this “across”．
| A．a; a | B．an; a | C．an; the | D．the; the |
Only when he reached the tea-house ________ it was the same place he’d been in last year..
| A．he realized | B．he did realize |
| C．realized he | D．did he realize |
Rather than ______on a crowded bus, he always prefers _______a bicycle.
| A．rides; ride | B．ride; to ride |
| C．riding; ride | D．to ride; riding |
Unfortunately, a big fire __________ in Hawaii Hotel at 9:30 pm, October15.
| A．broke off | B．broke down |
| C．broke up | D．broke out |
The only way to succeed at the highest level is to have total belief ______you are better than anyone else.
| A．how | B．that | C．which | D．whether |
_________basic first-aid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known | C．Knowing | D．Being known |