【推荐1】David, this afternoon is _________ for me, so I can't watch the movie Cats and Peachtopia with you.

A．free

B．full

C．easy

D．difficult

【推荐2】—Frank, what do you think of physics?   

—I think it’s ________ math.

A．so difficult as

B．as difficult as

C．so difficultly as

【推荐3】It's getting _______ for young people to wear sunglasses in summer this year.

A．scary

B．interesting

C．difficult

D．popular

【推荐1】Teenagers shouldn’t spend plenty of time on ________ products. They are bad for eyes.

A．national

B．basic

C．electronic

D．natural

【推荐2】________ heaters must be correctly used, or they will probably cause fire.

A．Electric

B．Electricity

C．Electron

D．Electronic

【推荐3】Volunteering can provide ________ experience for us, so we must take an active part in it.

A．convenient

B．valuable

C．electronic

D．smooth

【推荐1】—Who do you think can be our new head?   
—Edison is the __________ choice — he has such strong leadership.

A．final

B．extra

C．simple

D．natural

【推荐3】It’s not polite to ask questions about others’ ________ life.

A．poor

B．personal

C．simple

D．healthy

【推荐1】—John, you can buy this dictionary for your 9-year-old sister for her birthday.
— Right.It’s colorful and ________, so it’s easy for her to understand.

A．tiny

B．similar

C．simple

D．famous