He is a success as a leader but he hasn’t ________ in teaching.
| A．many experiences | B．much experience |
| C．an experience | D．a lot experience |
Regarding China-US differences on human rights issues, Hong said the two sides can enhance mutual understanding through dialogue ______ on equality and mutual respect.
| A．based | B．to base | C．basing | D．base |
When we start gazing into the night sky with a telescope, soon we’ll be astonished by the realization _______ we and our world are part of this giant system.
| A．which | B．whether | C．that | D．as |
Karaoke, which was invented by the Japanese, ______ both wonders and problems.
| A．has been produced | B．was produced | C．produced | D．has produced |
European football is played in about 80 countries, _____ it the most popular sport in the world.
| A．making | B．made | C．to make | D．makes |
Obama didn’t explain ______ any larger principles have guided him through the historic convulsions of the 2011 Arab Spring.
| A．what | B．that | C．where | D．whether |