E-Commerce ______ mislead customers at times even though it's more convenient and faster in general.
| A．shall | B．should | C．can | D．must |
29．---- I wonder how much you charge for your services.
---- The first two are free ____ the third costs $30.
| A．while | B．until | C．when | D．Before |
28．She’ll never forget her stay there ________ she found her son who had gone missing two years before.
| A．that | B．which | C．where | D．when |
27．My uncle’s house in the downtown area is much smaller than ours , but it is twice
_______ expensive .
| A．as | B．so | C．too | D．very |
26．Not until I came home last night ________ to bed.
| A．Mum did go | B．did Mum go | C．went Mum | D．Mum went |
25．----Why don’t we choose that road to save time?
----The bridge to it _________.
| A．has repaired | B．is repaired | C．is being repaired | D．will be repaired |