Police are ________ the disappearance of two children.
A、lookingupC
A(在書中)查找B仔細查閱，審查，(對某人)視而不見C調查，研究，查問D.觀看，旁觀，看待
—Davidhasmadegreatprogressrecently.—_______，and_______.
Amongthefollowingwords,“______”doesNOThaveinflectionalaffixes.
A mong the following words, “ ______ ” does NOT have inflectional affixes.
Collins COBUILD English Language Dictionary (1987) has some unique features such as definition, extra column and ______.
Which of the following is NOT one of the characteristics of idioms?
