The doctor recorded the ______ of the old man’s death as heart failure.
| A．effect | B．result | C．reason | D．cause |
When ______ the United Nations founded?
| A．is | B．are | C．was | D．were |
In my opinion, some of the news _____ unbelievable.
| A．are | B．is | C．has been | D．have been |
Joy and Sorrow _____ next-door neighbours.
| A．is | B．are | C．were | D．be |
Ten minutes ______ a long time for one who waits.
| A．seem | B．seems |
| C．seemed | D．are seemed |
E-mail, as well as telephones, ________ an important part in daily communication.
| A．is playing | B．have played |
| C．are playing | D．play |