Two ______ students ______ to the opening ceremony last Friday．（ ）
| A． |
hundreds； were invited |
| B． |
hundred； were invited |
| C． |
hundreds of； invited |
| D． |
hundred of； invited |
Chinese people find ______ our duty to help develop African countries along the Belt and Road （一带一路）．（ ）
A．itB．thisC．thatD．these
______ riding shared bikes（共享单车） is an environmentally friendly way to travel，many of the bikes are thrown everywhere．（ ）
A．AlthoughB．AsC．UnlessD．Until
To the teacher's joy，the student made great ______ this term．（ ）
A．resultB．preparation
C．suggestionD．progress
Daddy，I've run out of my pocket money．I spent 100 yuan ______ some favorite books．
OK．Here you are．But make sure you save money as well．（ ）
A．forB．onC．withD．at
Janet is sleeping at home．
She ______ be．I went for a walk with her just now．（ ）
A．can'tB．mustn'tC．needn'tD．won't