There________ a pen and two books on the desk.
A．are B．is C．aren't
My father wants to buy________shoes.
A．two pair of B．two pairs of C．two pairs
—Can I ________？
—Sure.
A．put on them B．try on them C．try them on
Peter is going on a big field trip ______．
A．yesterday B．next weekend C．everyday
Welcome to ________ shop.
A．Mary B．Mary's C．Marys