未知题型 A lot of ants are always invading my kitchen. They are a thorough ______ . A) nuisance B) trouble C)worry D) anxiety
未知题型 ._______ evidence that languageacquiring ability must be stimulated. A) If being B) It is C) There is D) There being
未知题型 We agreed to accept ______ they thought was the best tourist guide. A) whatever B) whomever C) whichever D) whoever