1.Some of the schools in Shanghai have moved one step closer

1.Some of the schools in Shanghai have moved one step closer to____
with the global education community.
a.being connected b.connect
c.having been connected d.be connected
为什么选A?这句话翻译起来是什么意思,
2.—What's the matter ,Sarah?you wear a sad look on your face.
—Oh ,nothing much.As a matter of fact,i____of my friends back home.
a.just thought B.have just been thinking
c.was just thinking d.have just thought
为什么选C?B是什么时态?
A感觉也对啊