Andeison entered the classroom, ____book in ___hand.
| A．×, his | B．×, × | C．a, × | D．a, the |
It is generally considered unwise to give a child ________ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
________ made the school proud was ________ more than 90% of the students had been admitted to key universities.
| A．What；because | B．What；that |
| C．That；what | D．That；because |
—You can't imagine ________ fantastic fun online chatting is.
—Really？But it may cause a lot of trouble sometimes.
| A．what | B．how | C．why | D．so |
It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.
| A．that | B．when | C．what | D．how |
A plan has been put forward ________ more graduates should go to work in the country.
| A．when | B．that | C．whether | D．how |