Without proper lessons, you could _____ a lot of bad habits when playing the piano.
| A．give up | B．catch up | C．pick up | D．keep up |
children believe they can succeed, they will never become totally independent．
| A．If | B．Though | C．Unless | D．When |
The climate conference was attended by 11,000 people, it the largest UN gathering ever held.
| A．making | B．to make | C．made | D．to be making |
At yesterday’s meeting lots of questions __________.
| A．brought up | B．went up | C．came up | D．broke up |
–Hi, Tom, You look tired.
--Yes, I _____________ the room all the afternoon.
| A．painted | B．had painted | C．have painted | D．have been painting |
–Amazing! You ____________ wear slippers at work.
--Don’t you know it’s a fashion?
| A．ought to | B．dare | C．should | D．mustn’t |