MANY SCIENTISTS ARE SURE ...LIFE ON OTHER PLANETS. A. THERE WAS B....

18. - ĐỀ KIỂM TRA MÔN TIẾNG ANH: PRACTICE TEST 23 PDF
Tiếng Anh ĐỀ KIỂM TRA MÔN TIẾNG ANH: PRACTICE TEST 23 PDF
18. Many scientists are sure ...life on other planets. a. there was b. there had been c. there are d. there is