a group of people， and a decision __ （make） today may have consequences far into the future.
70. For managers， every decision has constraints _____ （base） on policies， procedures and laws.
71. As I‘ll be away for a year， I’d appreciate _____ （hear） from you now and then.
72. What developed was a music readily _____ （take） on various forms and capable of an almost limitless range of expression.
73. Many other new techniques are available that enable more research _____ （do） in the test tube.
74. _____ （not， get）enough hands， she had great difficulty in accomplishing the task.
