__________, we’d bought a city map.We may get lost without it.

______ disappointed us most was that the guide wasalways asking us to leave ____ we thought very interesting

Mr Black is an experienced engineer, and he will be employed to ______ us in improving our equipment.

Jenny, do you know WeChat（微信）was created by—By Zhang Xiaolong, right

Peter, do you know who____ my dictionary —Sorry , I don’t know . I didn’t do it .