未知题型 This kind of glasses manufactured by experienced craftsmen ______ comfortably. A) is worn B) wears C) wearing D) are worn
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