Whenever a natural disaster happens, we should offer ____ help we could to those victims.
| A．however | B．whatever | C．whenever | D．whichever |
Three-fourths of the surface of the earth＿＿＿sea．
| A．is | B．are | C．were | D．has been |
If these trousers are too big, buy a smaller＿＿＿．
| A．set | B．one | C．copy | D．pair |
—— Did you find your pen this afternoon?
—— No, I didn’t find＿＿＿＿＿, but I’ve bought＿＿＿＿＿．
| A．it； it | B．one； one | C．it； one | D．one； it |
His “Selected Stories”＿＿＿＿＿first published in 1990．
| A．were | B．was | C．has been | D．have been |
Tom’s and John’s＿＿＿＿＿came to London last week．
| A．father-in-law | B．fathers-in-law | C．fathers-in-laws | D．father-in-laws |