L ook at the following utterances, then decide which involve gesturally deictic expressions and which involve symbolically deictic expressions. 下面各句中哪些指示语是手势用法,哪些是象征用法 a. This city is really beautiful. b. This book is written by Jack London. c. You can all come with me if you like. d. The red cap is for you. e. The students can ’ t afford a full holiday this year. f. Sit in that chair.