Li Lei is one of ________ in our class.
| A．best students | B．a good student |
| C．good students | D．the best students |
I hear they are going to London, but I don’t know ________ they will stay there.
| A．how soon | B．how often |
| C．how long | D．how fast |
My husband always ______ me flowers every week before we got married, but now he never ________.
| A．sends; does | B．sent; does |
| C．was going to send; do | D．sent; do |
If we ______ take environmental problems seriously, the earth _______ worse and worse.
| A．don’t; will be | B．won’t; isn’t |
| C．won’t; is | D．don’t; won’t be |
— How far is it from Tianjin to Changsha？
— It is a _______ flight from Tianjin to Changsha.
| A．2-hour-long | B．2-hours-long |
| C．2 hours’ long | D．2 hour long |
She got a nice skirt as a present on her birthday. Do you know _______ ？
| A．what was it made of | B．how much did it cost |
| C．who buys it for her | D．where she bought it |