We didn’t know you were in trouble at that time, _______ we would have given you a hand.
| A．while | B．when | C．therefore | D．otherwise |
In our class, when the bell rang and the teacher closed his book, it was a for everyone to stand up.
| A．signal | B．chance | C．mark | D．measure |
The new dictionaries are very useful. They well and already.
| A．sell; have been sold out | B．sold; had sold out |
| C．sell; sell out | D．are sold; have been sold out |
Every year a flood of farmers arrive in Shenzhen for the money-making jobs theybefore leaving their hometowns.
| A．promised | B．were promised | C．have promised | D．have been promised |
A new cinema here . They hope to finish it next month.
| A．will be built | B．is built | C．has been built | D．is being built |
I bought a dress for only 10 dollars in a sale; it was a real .
| A．exchange | B．bargain | C．trade | D．business |