A.protect | B.prevent | C.stop | D.keep |
A.the biggest desert | B.biggest desert | C.the biggest deserts | D.biggest deserts |
A.the longest river | B.longest rivers | C.the longest rivers | D.longer rivers |
A.date | B.number | C.person | D.population |
A.harm | B.keep | C.stop | D.protect |
A.large | B.less | C.smaller | D.fewer |
A.How many | B.Which | C.How much | D.What |