Just as Professor Scott often________it，success is ninety-nine percent mental attitude.

ck Ma is ambitious about his firm’s future, ______ that Alibaba’s achievements will one day top Walmart.

The stone is____ heavy for me _____.

It is a widely held belief____honesty and integrity(正直) are the qualities ____ a leader should be made of.

There ____ a pen and some books in my bag.