Last Sunday my brother and I our grandparents.（ ）
| A． |
will visit |
B． |
visits |
C． |
visit |
D． |
visited |
I can't stand swimming in cold rivers in winter．
But it's ______ for your health．You know I often swim in rivers in different seasons．（ ）
A．helpfulB．harmfulC．painfulD．careful
Look!So many colorful bicycles in two lines over there．
They're for public．This ______ of green smart traffic is everywhere in Xiangyang city．（ ）
A．numberB．pairC．kindD．piece
Who is Dave looking ______？
His mother．She's been in hospital for a few days．（ ）
A．forB．afterC．atD．up
It shouldn't take long to clear up after the party if we all volunteer to help．
That's right．_________________________．（ ）
A．Many hands make light work．
B．Something is better than nothing．
C．The sooner begun，the sooner done．
D．Practice makes perfect．
Today's young people can't live without smart phones．
They keep their hands on the phones whether they go，even while they______meals．（ ）
A．haveB．are having
C．were havingD．will have