Scientists are trying to develop a special material, _______ they will make use of in space.
| A．it | B．that | C．what | D．one |
Therestofthenovel _________veryinteresting.
| A．were | B．are | C．is | D．seem |
Mostofhistime _____inreadingnovels.
| A．arespent | B．isspent | C．werespent | D．wasspending |
Mostofthemistakes____becauseofcarelessness.
| A．weremade | B．aremade | C．hasbeenmade | D．weremaking |
Theboysittingbythewindowistheonlyoneofthestudentswho _______fromthecountrysideinourschool.
| A．are | B．is | C．were | D．was |
Thestudentsinourschooleach_________anEnglishdictionary.
| A．have | B．has | C．had | D．arehaving |