I have to go on，________difficulties I will meet.
| A．whatever | B．however | C．whoever | D．what |
More than one hundred students ___ been sent to Japan since 2000.
| A．have | B．has | C．are | D．is |
Setting fire to the public buildings ___ highly dangerous and forbidden by law.
| A．are | B．is | C．has | D．were |
Tenminutes____enoughforme.
| A．is | B．are | C．am | D．be |
Nothingbutgrassandtrees____thehill.
| A．covers | B．cover | C．covering | D．iscovering |
There____adesk,twobedsandfourchairsintheroom
| A．is | B．are | C．has | D．have |