The floor is quite wet, and my teacher told us _________ quickly.
| A．to mop up it | B．mopped it up | C．to mop it up | D．mop it up |
Heremy baseballs.
| A．are | B．is | C．be | D．am |
---- Hello, Tim! What’s that?
---- It’seraser.
| A．a | B．an | C．the | D．不填 |
---What do you think of your boss?
---He always work hard and he is ____________ late for work.
A usually B often C hardly ever D many times
What is happening in Japan made people all over the world _____________ sad.
A feel B to feel C felt D feeling
---What ____________ you _____________ last weekend?
---I wrote some letters and read a book.
A do, do B did, do C will, do D have, done