______ he realized it was too late to return home.
| A．Not until dark | B．It was until dark that | C．It was not until dark that | D．It was dark that |
With more forests _____being destroyed, huge _____ of good earth _____ washed away each year.
| A．are ; number ; is | B．/ ; quantities / are |
| C．be ; number ; are | D．/ ; quantities ;is |
I just wonder _____ that makes him so excited?
| A．why it does | B．what he does |
| C．how it is | D．what it is |
---I don’t think your children could have been used to the quick pace of life while working in Shenzhen, _____they?
---_____. They thought of returning to Changchun.
| A．had ; Yes | B．do ; Yes | C．have ; No. | D．were ; No |
Parents are taught to be aware of _____ important mental health is to their children.
| A．that | B．how | C．what | D．so |
You type almost anything into the space provided on Baidu and in a second it _____with thousands of references.
| A．catches up | B．comes up | C．ends up | D．turns up |