Did you hear someone knock at the door just now？
Sorry．I ______ to my friend on the phone．（ ）
| A． |
was talking |
| B． |
talked |
| C． |
am talking |
I wonder how the Chinese team reached the summit of Mount Qomolangma this year．
________Let's find the information on the Internet． （ ）
A．I have no idea．B．You're welcome．
C．Don't mention it．D．What a pity!
These activities at bedtime can get kids excited and make it hard for them to____ and sleep．（ ）
A．come downB．break downC．calm downD．sit down
What our society is like is decided by____ everyone chooses to behave．（ ）
A．whereB．whenC．howD．why
The Birdwatching Society goes to Zhalong Nature Reserve___ the birds every year．（ ）
A．to countB．countingC．countD．counts
Although Zhong Nanshan knows the new virus is more____ to old people， he cares little for his own safety．（ ）
A．politeB．dangerousC．friendlyD．important