Taking care of children calls for your time, abilities, patience and emotions. _____, it is not a simple thing.
A．On the contrary B．What's more
C．In conclusion D．On the other hand
All the members of the WTO should follow the ______ of trust and fair(公平) trade.
A．instructions B．principles C．orders D．rules
In our class there are 46 students, ______ half wear glasses.
A．in whom B．in them C．of whom D．of them
Tom took a taxi to the airport, only ______ his plane high up in the sky.
A．to find B．finding C．being found D．to have found
New technologies have made ______ possible to turn out new products faster and at a lower cost.
A．that B．this C．one D．it
Not only I but also Jane and Marry ______ tired of having one examination after another.
A．is B．are C．am D．be
